Information from Jean Williams-Woodward, UGA Extension Plant Pathologist
I’ve been asked on numerous occasions for an efficacy table for fungicides labeled for ornamental plants. Well, myself, Alan Windham (University of Tennessee), Kelly Ivors (Cal Poly) and Nicole Ward Gauthier (University of Kentucky) put one together that lists products and their relative effectiveness for managing 14 diseases as part of a Southern Region IPM project. Diseases include:
- bacterial leaf spots/blights
- black root rot (Thielaviopsis basicola)
- cedar rusts (Gymnosporangium rusts)
- Conifer Tip Blights
- Downy mildew
- Fire blight
- Fungal stem cankers
- Fungal leaf spots
- Fusarium stem rot
- Passalora (syn. Cercosporidium, Cercospora) needle blight on Leyland cypress and other needled evergreens
- Phytophthora root rot
- Pythium root rot
- Powdery mildew
- Rhizoctonia blight/root rot
The table is not all inclusive, but it’s a start that we hope to expand upon and update. You can find the table here
Editor’s note – You can save the file as a pdf file to your computer. If you print it, do so in landscape format. I find the file to be more easily read as a pdf file on the computer since you can enlarge the size of the page. This is a great resource!